When I test Andrey's problem, I saw the livelock and sysrq-t says
there are many tasks in cond_resched after try_to_free_pages.

If did_some_progress is false, cond_resched could delay oom killing so
It might be killing another task.

This patch accelerates oom killing without unnecessary giving CPU
to another task. It could help avoding unnecessary another task killing
and livelock situation a litte bit.

Cc: KOSAKI Motohiro <redacted>
Cc: KAMEZAWA Hiroyuki <redacted>
Cc: Andrey Vagin <redacted>
Signed-off-by: Minchan Kim <redacted>

	Reviewed-by: KOSAKI Motohiro [off-list ref]





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